ProtoArc

ProtoArc Wireless Bluetooth Trackball Mouse, EM04 2.4G Ergonomic Rechargeable Mice with 5 Adjustable DPI, Thumb Control, 3 Device Connection, Smooth Tracking, for PC, iPad, Mac, Windows [Ergonomic Thumb Trackball] Equipped with a smooth trackball, use your thumb to move the cursor instead of moving your wrist and arm. This will effectively reduce fatigue and strain on your wrist and arm. It works not only on flat surfaces but also on your lap, sofa, and other surfaces, especially in tight spaces like a cluttered desktop. [Dual Bluetooth & 2.4G Wireless Connection] PLUG and PLAY. EM04 trackball mouse has triple connection modes....